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RESEARCH PAPERS

Accurate Spectral Modeling for Infrared Radiation

[+] Author and Article Information
S. N. Tiwari, S. K. Gupta

School of Engineering, Old Dominion University, Norfolk, Va.

J. Heat Transfer 100(2), 240-246 (May 01, 1978) (7 pages) doi:10.1115/1.3450789 History: Revised December 21, 1977; Online August 11, 2010

Abstract

Direct line-by-line integration and quasi-random band model techniques are employed to calculate the spectral transmittance and total band absorptance of the 4.7 μ CO, 4.3μ CO2 , 15μ CO2 , and 5.35μ NO bands. Results are obtained for different pressure and path lengths. These are compared with available theoretical and experimental investigations. Total band absorptance values are available in the literature for certain pressure and path length conditions for these gases. Total absorptances have been calculated for the same physical conditions, employing line-by-line and quasi-random band models and the continuous correlations of Tien and Lowder, Cess and Tiwari, and Felske and Tien. In almost all cases, the line-by-line results are found to be in excellent agreement with the experimental values. The range of validity of other models are discussed.

Copyright © 1978 by ASME
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